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58dc63c998
Add a tracepoint to follow the life of packets that get added to a call's receive buffer. Signed-off-by: David Howells <dhowells@redhat.com>
153 lines
4.6 KiB
C
153 lines
4.6 KiB
C
/* Miscellaneous bits
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*
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* Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include "ar-internal.h"
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/*
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* The maximum listening backlog queue size that may be set on a socket by
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* listen().
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*/
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unsigned int rxrpc_max_backlog __read_mostly = 10;
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/*
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* How long to wait before scheduling ACK generation after seeing a
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* packet with RXRPC_REQUEST_ACK set (in jiffies).
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*/
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unsigned int rxrpc_requested_ack_delay = 1;
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/*
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* How long to wait before scheduling an ACK with subtype DELAY (in jiffies).
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*
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* We use this when we've received new data packets. If those packets aren't
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* all consumed within this time we will send a DELAY ACK if an ACK was not
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* requested to let the sender know it doesn't need to resend.
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*/
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unsigned int rxrpc_soft_ack_delay = 1 * HZ;
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/*
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* How long to wait before scheduling an ACK with subtype IDLE (in jiffies).
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*
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* We use this when we've consumed some previously soft-ACK'd packets when
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* further packets aren't immediately received to decide when to send an IDLE
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* ACK let the other end know that it can free up its Tx buffer space.
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*/
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unsigned int rxrpc_idle_ack_delay = 0.5 * HZ;
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/*
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* Receive window size in packets. This indicates the maximum number of
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* unconsumed received packets we're willing to retain in memory. Once this
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* limit is hit, we should generate an EXCEEDS_WINDOW ACK and discard further
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* packets.
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*/
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unsigned int rxrpc_rx_window_size = RXRPC_INIT_RX_WINDOW_SIZE;
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#if (RXRPC_RXTX_BUFF_SIZE - 1) < RXRPC_INIT_RX_WINDOW_SIZE
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#error Need to reduce RXRPC_INIT_RX_WINDOW_SIZE
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#endif
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/*
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* Maximum Rx MTU size. This indicates to the sender the size of jumbo packet
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* made by gluing normal packets together that we're willing to handle.
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*/
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unsigned int rxrpc_rx_mtu = 5692;
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/*
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* The maximum number of fragments in a received jumbo packet that we tell the
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* sender that we're willing to handle.
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*/
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unsigned int rxrpc_rx_jumbo_max = 4;
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/*
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* Time till packet resend (in jiffies).
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*/
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unsigned int rxrpc_resend_timeout = 4 * HZ;
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const char *const rxrpc_pkts[] = {
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"?00",
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"DATA", "ACK", "BUSY", "ABORT", "ACKALL", "CHALL", "RESP", "DEBUG",
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"?09", "?10", "?11", "?12", "VERSION", "?14", "?15"
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};
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const s8 rxrpc_ack_priority[] = {
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[0] = 0,
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[RXRPC_ACK_DELAY] = 1,
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[RXRPC_ACK_REQUESTED] = 2,
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[RXRPC_ACK_IDLE] = 3,
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[RXRPC_ACK_PING_RESPONSE] = 4,
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[RXRPC_ACK_DUPLICATE] = 5,
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[RXRPC_ACK_OUT_OF_SEQUENCE] = 6,
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[RXRPC_ACK_EXCEEDS_WINDOW] = 7,
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[RXRPC_ACK_NOSPACE] = 8,
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};
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const char *rxrpc_acks(u8 reason)
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{
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static const char *const str[] = {
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"---", "REQ", "DUP", "OOS", "WIN", "MEM", "PNG", "PNR", "DLY",
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"IDL", "-?-"
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};
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if (reason >= ARRAY_SIZE(str))
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reason = ARRAY_SIZE(str) - 1;
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return str[reason];
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}
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const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4] = {
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[rxrpc_conn_new_client] = "NWc",
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[rxrpc_conn_new_service] = "NWs",
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[rxrpc_conn_queued] = "QUE",
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[rxrpc_conn_seen] = "SEE",
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[rxrpc_conn_got] = "GOT",
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[rxrpc_conn_put_client] = "PTc",
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[rxrpc_conn_put_service] = "PTs",
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};
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const char rxrpc_client_traces[rxrpc_client__nr_trace][7] = {
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[rxrpc_client_activate_chans] = "Activa",
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[rxrpc_client_alloc] = "Alloc ",
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[rxrpc_client_chan_activate] = "ChActv",
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[rxrpc_client_chan_disconnect] = "ChDisc",
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[rxrpc_client_chan_pass] = "ChPass",
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[rxrpc_client_chan_unstarted] = "ChUnst",
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[rxrpc_client_cleanup] = "Clean ",
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[rxrpc_client_count] = "Count ",
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[rxrpc_client_discard] = "Discar",
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[rxrpc_client_duplicate] = "Duplic",
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[rxrpc_client_exposed] = "Expose",
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[rxrpc_client_replace] = "Replac",
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[rxrpc_client_to_active] = "->Actv",
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[rxrpc_client_to_culled] = "->Cull",
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[rxrpc_client_to_idle] = "->Idle",
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[rxrpc_client_to_inactive] = "->Inac",
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[rxrpc_client_to_waiting] = "->Wait",
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[rxrpc_client_uncount] = "Uncoun",
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};
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const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4] = {
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[rxrpc_transmit_wait] = "WAI",
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[rxrpc_transmit_queue] = "QUE",
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[rxrpc_transmit_queue_reqack] = "QRA",
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[rxrpc_transmit_queue_last] = "QLS",
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[rxrpc_transmit_rotate] = "ROT",
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[rxrpc_transmit_end] = "END",
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};
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const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4] = {
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[rxrpc_receive_incoming] = "INC",
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[rxrpc_receive_queue] = "QUE",
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[rxrpc_receive_queue_last] = "QLS",
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[rxrpc_receive_front] = "FRN",
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[rxrpc_receive_rotate] = "ROT",
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[rxrpc_receive_end] = "END",
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};
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